煤炭工程 ›› 2025, Vol. 57 ›› Issue (4): 75-81.doi: 10. 11799/ ce202504011

• 生产技术 • 上一篇    下一篇

特厚煤层工作面强矿压显现及治理技术研究

李江,赵斌   

  1. 中国大唐集团能源投资有限责任公司
  • 收稿日期:2024-05-11 修回日期:2024-08-09 出版日期:2025-04-10 发布日期:2025-05-28
  • 通讯作者: 李江 E-mail:123166769@qq.com

Research on strong mine pressure behavior and the control technology in an extra-thick coal seam working face

LI Jiang   

  • Received:2024-05-11 Revised:2024-08-09 Online:2025-04-10 Published:2025-05-28
  • Contact: LI Jiang E-mail:123166769@qq.com

摘要:

针对特厚煤层综放工作面强矿压显现问题,以龙王沟煤矿61607工作面为工程背景,通过理论计算与现场实测相结合的方式,系统的分析了工作面强矿压显现特征与采动应力分布规律,并在此基础上提出了“巷道常规水力压裂+工作面定向钻水力压裂”相结合的强矿压治理措施,结果表明:工作面超前支承压力影响范围大约为140m,支承压力峰值点距离煤壁距离大约50m,采动影响扰动一度达到底板上方200m,开采过程中来压强度大,震顶现象频繁,支架工作阻力可达51.5MPa,采取顶板预裂措施后,周期来压步距、压力持续长度等参数分别减小了26.05%、41.56%,微震事件也呈现出明显的“高频+低能”分布规律,防治效果显著,可以为周边类似矿井探索强矿压治理技术提供借鉴。

关键词:

特厚煤层 , 强矿压显现 , 矿震 , 水力压裂 , 效果检验

Abstract:

In response to the problem of strong mining pressure manifestation in the working face, taking the 61607 working face of longwanggou coal mine as the engineering background, the characteristics of strong mining pressure manifestation in the working face and the distribution law of mining stress were systematically analyzed through theoretical calculation and on-site measurement. Based on this, a strong mining pressure control measure combining “conventional hydraulic fracturing+directional drilling hydraulic fracturing” was proposed. The results showed that the influence range of advanced support pressure in the working face was about 140 m, The distance between the peak point of support pressure and the coal wall is about 50 m. After adopting the roof pre cracking measure in the working face, the parameters such as cyclic pressure step distance and pressure duration have decreased by 26.05% and 41.56%, respectively. Microseismic events also show a clear distribution pattern of “high frequency+low energy”, with significant effects, it can provide reference significance for exploring strong mining pressure control technology for similar mines in the surrounding area.

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